Chaitophorus nigricantis nigricantis Pintera, 1987

Stekolshchikov, Andrey V. & Buga, Sergey V., 2018, The aphid fauna (Hemiptera, Sternorrhyncha, Aphidomorpha) of Murmansk province (Russia), with description of Aphis khrulevi sp. nov. and Dysaphis karyakini sp. nov. and males of Chaitophorus nigricantis Pintera, 1987, Zootaxa 4527 (4), pp. 451-493 : 460-464

* Chaitophorus nigricantis nigricantis Pintera, 1987

( Figs. 2–9 , Tabl. 1)

Material. 1NMon: Salix phylicifolia , 9.vii.1998, apt. ( SB). 3NMon: Salix caprea , 9.vii.1998, apt. ( SB). 50SMon: Salix phylicifolia , 12.vii.1998, apt. ( SB). Luv : Salix sp ., 1.viii.2002, apt. and apterous male; Salix sp., 6.VII.2003, apt.; Salix phylicifolia , 3.viii.2004, apt., al., apterous males and alate males; Salix sp., 11.vii.2003, apt.; 19.vii.2003, apt.; Salix phylicifolia , 6.vii.2005, apt.; Salix sp., 2.viii.2006, apt. and apterous male ( AS +ESh) .

Comments. This subspecies is known only from northern Europe: Sweden and Finland ( Pintera, 1987). In the Murmansk province Ch. nigricantis was collected in the vicinity of Monchegorsk and near Luvenga village on lower sides of leaves of Salix phylicifolia and Salix sp. In early August, near Luvenga village, apterous and alate males appeared in the colonies of this species. The male has not been described previously. The apterous male is described in detail below and for the alate male only differences from that are exposed.

Description. Apterous male. Body spindle-shaped, 2.2–2.4 times as long as width. The living specimens black or very dark-brown, shine, with dark antennae (except 1st and 2nd segment and base of 3rd–5th segments) or antennae relatively pale with grey 4th–6th segments, legs and siphunculi pale. Cleared specimens have very dark brown head, sclerites and bands on all tergites and sternites of body (except sternite of prothorax); 1st segment of antennae and siphunculi brown, antennal segments 2nd–6th gradually darkening towards apex; ultimate rostral segment, apices of tibiae and tarsi light-brown. Dorsal side of thorax and abdomen with sclerotized bands and marginal maculae on all segments; all bands fused with marginal maculae and bands on abdominal tergites II–VI fused into a single shield, except for a transparent “window” on the border between tergites II and III (tergites II and III fused only anterolaterally); bands on thorax of one male (young?) sclerotized, but colourless, brown only in the middle (along central line). Sternites of meso- and metathorax and all sternites of abdomen with thin sclerotized band. Surface of head, dorsal surface of thorax and abdominal tergites I–VI smooth, wrinkled, with rare pointed spinules, which on abdominal tergites sometimes form short row, surface of tergites VII–VIII with the long rows of small pointed spinules; surface of ventral side of meso- and metathorax and abdomen with long rows of small pointed spinules sometimes forming strongly stretched reticulate cells. Setae on all body and appendages long and finely pointed, and only some dorsal and marginal setae on abdominal tergites I–VI blunt or enlarged on apex and very weakly bifurcate. Head without epicranial suture. Frontal tubercles almost not developed, antennal tubercles very low, median tubercle indistinct. Antennae 6-segmented, with secondary rhinaria. Secondary rhinaria are rounded, rarely elliptical, spaced evenly along the segment, third antennal segment with 10–22 (13.8) secondary rhinaria of different sizes (from 8 to 18 mµ), 4th segment with 8–12 (9.7) and 5th segment with 5–10 (6.3) secondary rhinaria. 1st and 2nd antennal segments slightly wrinkled, almost smooth, 3rd–6th segments with scales which small on 3rd segment and well-defined on 5–6th segments. Rostrum reaching metathorax. Ultimate rostral segment elongated wedge-shaped, 1.65–2.00 (1.82) times as long as its basal width. Legs normal. First tarsal segments with 6 or 7 setae and only on one fore legs of one specimen first tarsal segments with 5 setae. Spiracles small, weakly reniform, almost rounded. Siphunculi relatively long, almost cylindrical, weakly tapering towards apex, with distinct polygonal reticulation. Cauda distinctly knobbed with long finely pointed setae.

Apterous males Alate males Number of samples / number of specimens 3 / 5 1 / 2 Length of body 1238 – 1421 (1328) 1675 – 1716 Length of antenna 1224 – 1479 (1337) 1713 – 1797 (1756) Length of antenna / length of body 0.97 – 1.09 (1.02) 1.02 – 1.05 (1.04) Hind femora length 350 – 437 (393) 467 – 497 (481) length / length of body 0.28 – 0.34 (0.30) 0.28 – 0.29 length / head width across the compound eyes 0.90 – 1.12 (0.98) 1.13 – 1.16 (1.15) Hind tibia length 569 – 726 (643) 822 – 853 (836) length / length of body 0.45 – 0.55 (0.49) 0.49 – 0.50 Head width across the compound eyes 384 – 440 (403) 427 Setae on head occipital length 81 – 126 (108) 94 – 96 length / articular diameter of 3rd antennal segment 4.57 – 7.14 (5.90) 4.11 – 5.43 (4.73) frontal length 114 – 149 (133) 106 – 121 (114) length / articular diameter of 3rd antennal segment 6.43 – 7.86 (7.39) 5.25 – 6.00 (5.65) on 1st antennal segment number 5 – 6 (5.3) 5 – 7 (6.3) length 35 – 56 (49) 43 – 46 (44) on 3rd antennal segment number on outerside of segment 4 – 8 (6.0) 6 – 10 (8.3) on innerside of segment 0 – 2 (1.5) 2 – 3 (2.5) length 53 – 89 (70) 59 – 84 (74) length / articular diameter of 3rd antennal segment 3.00 – 5.00 (3.86) 2.94 – 4.14 (3.69) number on 5th antennal segment 2 – 6 (4.2) 5 – 8 (6.3) on base of last antennal segment number 1 – 3 (2.0) 2 length / articular diameter of 3rd antennal segment 1.78 – 3.00 (2.46) 2.75 – 3.89 (3.42) length of ventral seta on hind trochanter / basal diameter of hind femur 1.29 – 1.71 (1.46) 1.05 – 1.39 (1.26) on hind femur length of dorsal 56 – 81 (68) 68 – 84 (75) longest ventral 51 – 76 (65) 68 – 84 (75) dorso-apical 43 – 66 (58) 43 – 53 (47) on hind tibia longest dorsal 81 – 109 (94) 91 – 111 (104) longest dorsal / mid-diameter of the hind tibia 2.46 – 3.31 (2.67) 2.57 – 3.58 (3.17)

Alate male. Body 2.6 times as long as width. The living specimens light green, head, thorax, apices of 3rd antennal segment, 4th–6th antennal segments, tarsi and siphunculi black. Cleared specimens have very dark brown head and thorax, brown 1st segment of antennae, sclerites and bands on all tergites and sternites of abdomen and siphunculi, light-brown apices of 3rd–5th antennal segment and apex of base of last antennal segment (around primary rhinaria), ultimate rostral segment, apices of tibiae and tarsi. Dorsal side of abdomen with sclerotized bands and marginal maculae on all segments which never fused with each other, only band on tergite VII fused with marginal maculae; ventral side of abdomen with thin sclerotized band on all sternites. Only long finely pointed setae present on body and appendages. Third antennal segment with 19–22 (20.3) secondary rhinaria of different sizes (from 8 to 17 mµ), 4th segment with 11–12 (11.5) and 5th segment with 6–8 (7.3) secondary rhinaria. Ultimate rostral segment 1.75–1.94 (1.85) times as long as its basal width. First tarsal segments with 6 or 7 setae.

Chaitophorus populeti (Panzer, 1801)

Published information. LRCh: Populus tremula (Stekolshchikov, 2012) .

Material. LRCh: Populus tremula , 9.vii.2004, apt. and imm. [11.vii.2004 apt. and al.] ( AS). Luv : Populus tremula , 23.vii.2002, apt. and al. ( AS). Vel : Populus tremula , 3.vii.2004, fund. (VZh).

Chaitophorus populialbae (Boyer de Fonscolombe, 1801)

Published information. LRCh: Populus tremula (Stekolshchikov, 2012) .

Material. LRCh: Populus tremula , 9.vii.2004, apt. and al. ( AS) .

Chaitophorus salicti (Schrank, 1801)

Published information. LRCh: Salix caprea (Stekolshchikov, 2012) .

Material. 15NMon: Salix caprea and Salix myrsinifolia borealis , 14.vii.1998, apt. (SB). LRCh: Salix caprea , 9.vii.2004, apt. and al. ( AS). Vel: Salix caprea , 9.vii.2005, apt. and al. (AK). Luv: Salix caprea , 30.vii.2006, apt. ( AS).

Chaitophorus tremulae Koch, 1854

Published information. MP: without host plant ( Shaposhnikov, 1964). LRCh: Populus tremula (Stekolshchikov, 2012) .

Material. 9SMon: Populus tremula , 8.vii.1998, apt. ( SB). 1NMon: Populus tremula , 7.vii.1998, apt. ( SB). LRCh: Populus tremula , 10.vii.2004, apt. and al. ( AS). Luv : Populus tremula , 17.vii.2005, apt. ( AS) .

Figures

FIGURES 2–9. Chaitophorus nigricantis nigricantis Pintera, 1987, apt. and al. male. 2, body of apt. male; 3, abdomen of al. male; 4, frons of apt. male; 5, antenna of apt. male; 6, ultimate rostral segments of apt. male; 7, hind tarsus of apt. male; 8, siphunculus of al. male; 9, cauda of apt. male.